Portion of a golf club head



FIG. 1 is a perspective of a portion of a golf club head showing my new design;

FIG. 2 is a plan view thereof; and,

FIG. 3 is a rear elevational view thereof.

The broken lines immediately adjacent to the rear edges of the shaded areas represent an unclaimed boundary of the design. The broken line showing of the circular elements is for illustrative purposes only and forms no part of the claimed design. The broken line showing of the remainder of the golf club head is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a golf club head, as shown and described. 